Transfer ink for producing indelible markings



. 25 duce a, fusible solid or semi-solid inde 'ble 1 washin K Drawing.

. and 55 Hanson Place, Brooklyn, in the city 7 of New York, count of K ngs, State of New York, respective y, have invented cer- 10. tain new and useful Improvements in Transfer Inks for Producing Indelible Markings,

of which the following is a specification. This invention relates to a new and proved transfer ink for producing indelible markings upon fabrics of various colors and upon articles made from fabrics, such Q astowels and the like.

- One of the ob'ects ofthis invention is to provide a trans er ink which can be used for making transfers whereby an indelible design of any desired kind can be produ upon towels and other objects, so as to identify them, to serve as trade marks or for other pu oses.

Another ob ect of this invention is to rotransfer ink which is softened and taken u by any fabric'when the said ink'is heate Another object of this invention is to provide a transfer ink containing a dye stud which is precipitated in or on the fibre of the fabric to be marked. duringthe first operation. Anoter object of this invention is to provide a transfer having a dye 5W5 of a basic nature combined with a base or carrying medium of an acid nature.

' 7 Another object of this invention is to rovide a transfer ink having such amedium a which issoluble in or is removed by soap solutions or other alkaline solutions.

Other objects of this invention wiii be at forth in the following description which will illustrate some preferred embodiments ac thereof.

At the present time there, are no sim to processes for marking linen and cotton goons, which will quickly and cheaplygive an 7 indelible mark or design of y desired as nature and which can serve as a trade mark or to identify the articie in the laundry or the like. V The method of marking linen by embroiderybrthe like is expensive and ts the FER INK FOR PRODUG Tit? 1' 'complexit of the design which can be em- 1 ed 'fh HID-- V are H -2 .r anon s'rnr no i. 0a., or

ELE i:-:. not :68.

Application filed April 1, a Serial no. eeaeaa EYE p o euse of a marking ink with a rub er stamp or metal die or type enables the use of different designs but the permanency of the mark depends entirely upon the character of the ink used. The use of an ordinary pen does not produce a neat mark or design and does not permit the rapid and cheap ap lication' of a complex design.

ccording to this recess, a eavy viscous ink is secured whic can be readily used for the manufacture of transfers of the type which yield a mark or design when heat is applied thereto, as, for example, by means of an ordinary hot fiat iron. Transfers of this ty e are well known, but a satisfactory indelib e ink therefor has not yet been de velo ed.

T 's process consists in uniting, either physicaliy or chemically, a dye which 'is resistant to the washing fluid used in laundry work, with a car ing medium which is separable from said ye when acted upon by said fluids, so as toproduce a fusible.

ink which can be used in making transfers.

It has been discovered for example, that if a dye of a basic nature, such as induline base, ,or nigrosine base, is unixed with an acid such as stearic acid or the like, that this mixture, which is believed to consist of a true compound, can be used for making a fusible ink which is indelible and does not smear when the transfer is applied or when the article to which the transfer is applied, is washed and ironed. When the various Ends and the stearic acid is substantiaiiy or. compietniy removed from the art-icie in the first washing, heaving the dye stud precipitated in or on the fibre of the articie. The dye stuff acts as an indelible 16 and non-smearing pigment or coioring matter. r

The preferred formuia is made from one part b weight of stearic acid and one and one ha f parts of'induiine base. lit is pre- It ferred to use a double pressed stearic acid which is sold in the trade under that name and this shouid be free firm" grit or dry, it is treated with alkaline solutions of ca and of a gray to white color. The induline base is preferably of a blue shade and it should be clean and insoluble in'water.

The mixture may be made in: various ways but it is preferred to melt the stearic acid and dissolve the induline base therein,

'while stirring very vigorously and rapidly.

- other suitable dye stuffs could be used if they are resistant to said washing fluids and capable of being mixed with a vehicle or medium of the type before mentioned. These washing fluids are so strongly basic that they separate the dye from the carrying medium.

As the induline, which is the coloring matter, is dissolved in the stearic acid which is the carrying vehicle or medium therefor, the solution gradually becomes more viscous, less greasy and of a higher melting point. Eventually a point is reached where the solution becomes too thick to handle in the process of making the transfer. It is believed that the reaction between the dye and the acid vehicle produces a product which is soluble in stearic acid. However, it is not believed that there is any real reaction between the fibre of the article to which the transfer is applied and the dye stufi.

Transfers madewith an ink of the kind before mentioned are most successful in marking goods of a close texture, but they can be used with varying success on other classes of goods.

Transfers made by means of this ink can be applied whenever the article can withstand the application of a hot iron.

Whenever any substance or substances are mentioned in the claims, it is to be understood that such mention includes any equivalent or equivalents therefor mentioned in the preceding description.

Preferred embodiments of this invention have been described, but it is obvious that chan es and omissions could be made without eparting from its spirit and it is not desired to limit this invention to any definite theory of operation, 'asi-t is believed that the reactions involved are quite complicated.

We claim: 1. A transfer ink including a dye incorporated in a medium which is adapted to be separated from said dye when the said ink is acted upon by a base.

2. A fusible transfer ink including a dye incorporated in a medium-"which is adapted to be separated from the said dye when the said ink is acted upon b a basic substance.

an alkaline solution, said ink bein adapted to be taken up by a fabric when eated in contact with said fabric, said dye being adapted to remain on the fibre of the said fabric when said fabric is Washed in alkaline solution.

5. An indelible, non-smearing transfer ink including an induline base incorporated in a stearic acid medium.

6. An indelible, non-smearing, fusible transfer ink consisting substantially of one part by wei ht of stearic acid having one and one half parts of induline base incorporated therein.

7. A method of making an indelible, nonsmearing, fusible trans er ink which consists in melting a fusible acid," carrying-medium and then adding a dye of a basic nature while stirring the ingredients so as to produce a homogeneous mixture.

In testimony whereof we hereunto afiix our signatures.

TROWBRIDGE MARSTON. WINTHROP STANLEY LAWRENCE. 

